Four hours after takeoff, the pilot manually sent a message: traversing dark, lightning-filled clouds. Satellite data showed that the headwind was reaching 100 miles (160 kilometers) per hour.
At 4 hours and 10 minutes after takeoff, the aircraft information system began to automatically send a series of messages in sequence: the autopilot system failed; the flight control system was forced to switch to the backup power supply; the balance control system was damaged.
At 4 hours and 13 minutes after takeoff, the aircraft information system continued to send messages: the speedometer failed; the altimeter failed; the direction indicator failed; the flight control system had an electrical supply fault; the wing spoilers malfunctioned.
Air France Flight 447 Tragedy - Final Moments Revealed, Black Box Solves the Mystery of the Disappearance
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